Why don’t I see my manometer measurements in Gas Furnace mode?

The most common issue is not having the probes mapped. Click the T/P button in the heating screen, then tap +Pres. See if you have data coming in from the manometer to the manifold pressure. If you do not, go to the tool box, from the probe manager, select the probe that is measuring manifold pressure, tap it and map it to that function.